17.72% is the change from 491 to 578
Calculation steps:
[( 578 - 491 ) ÷ 491] x 100 = 17.72%
Formula
Percentage change = [(578 - 491) / 491] x 100
Subtract the new number by the original number
578 - 491 = 87
87 ÷ 491 = 0.17718940936863545
0.17718940936863545 x 100 = 17.72%